What causes red eyes when taking pictures?

I have a high end digital Canon camera. I recently took pictures of me with this cute guy I met and every single picture of him came out with his eyes circled in red by the camera like a monster! (while mine mysteriously came out just fine). So what causes this and can it be avoided?!

The evil inside.

Answer by GBF on 29 Dec 2009 04:43:03

The light, you can go on photobucket.com make a account and upload and remove red eyes

Answer by D on 29 Dec 2009 04:43:13

satan

praise god to prevent

but then you get this thing called white eye

seen mostly in christian pictures

Answer by Jiles on 29 Dec 2009 04:43:26

i think it just has to do with the lighting in the room, or glares, or cause of the flash.. maybe im not sure.

Answer by -*JeNn* (blondie:) on 29 Dec 2009 04:43:28

the flash.

Answer by nicoleeexx on 29 Dec 2009 04:43:48

I think its caused by red blood cells inside your eye, i don't realy know how to avoid it other than put red-eye-flash on

Answer by Chad on 29 Dec 2009 04:43:55
Best Answer

Red eye occurs when light enters the eye at almost level with the eye. Because light reflects at an angle equal and opposite to its entry (in layman's terms, it makes a "V" shape) if bright light (such as from a flash) enters the eye at almost no angle it will be reflected back, or visible to, the camera. This most often happens when the pupil of the eye is dilated and gives the light more room to enter and exit the eye.

Answer by Jason on 29 Dec 2009 04:43:55

Your face...um...duh?

Answer by Fluffy Hamster on 29 Dec 2009 04:44:05

[URL Truncated]

Answer by yati on 29 Dec 2009 04:44:11

Call your local priest to exorcise the demon out of this "cute guy"

Answer by Snare on 29 Dec 2009 04:44:49

beautiful blue eyes

Answer by kelsey on 29 Dec 2009 04:45:01

Like what "D" said...

People get red eyes in pictures because of the lighting. Also, if they're wearing contacts, their eyes usually turn out red. I have two friends, Brooke and Brittany, and when I took pictures of them, their eyes were red...and they both wear contacts. So don't worry, there's no monster.

:)

Answer by LightningBolt24 on 29 Dec 2009 04:45:12

Red eye happens when the flash reflects off of the retina (which is red due to blood vessels). A lot of cameras have red eye reduction that flashes once or twice before the picture is taken, to make the pupils constrict. Look through your camera's manual to see if it has this feature, and how to use it.

Answer by jellybeanchick on 29 Dec 2009 04:45:21

Actually, red eyes in photos happens because the flash reflects off of the black parts of your eyes (pupils) and back to the camera if there isn't much of an angle. The picture is recorded before the pupils have shrunken down enough to diminish the problem. Since some peoples pupils react faster, or are smaller to begin with, it happens to some and not to others. You may have a red-eye reduction setting since you have such a fancy camera. Use it, it will flash a light before the flash to constrict your pupils enough to eliminate the red eye problem.

Answer by Andrew S on 29 Dec 2009 04:46:08

The red is caused by the reflection of the flash, Next time do not look directly at the
camera while taking a flash picture. Photography wasa hobby of mine.

Answer by Charles D on 29 Dec 2009 04:49:43

You may have noticed that red eye only appears in pictures taken using a flash. The reason for this is simply that the flash causes red eye. Humans have a curved plate covering the back of their eyeballs called the retina. This is the part of the eye that actually detects the presence of light. When the flash on a camera fires, the bright, white light emitted by the bulb travels into the eye, and bounces off the retina back into the camera lens. If that was the entire story though, we would call it 'white eye'. While the light is inside our eye, it travels through many tiny blood vessels that are present to keep the eye alive. This is how the light gets its red color.

The flash on your camera is what causes red eye, so the simplest way to eliminate it is to take away the flash! Now obviously some pictures will need the flash, so I'm not suggesting that you never use it. Be aware however, that sometimes there are better solutions. Indoor pictures commonly use flashes. Why not consider turning on room lighting, or grabbing an extra table lamp, to give that extra light you need. Natural light is mostly preferable, so placing a subject by a window or door can also achieve this.

Outdoor pictures use flashes less commonly, but it can still be useful to bring out detail in shadowy parts of an image. Just remember to think about the range of your flash if you are using one outside.
The main thing to remember is that even if there's no need for a flash, people sometimes use one 'just because they can'. Avoid needless flashes, and problems like red eye can be minimised. Assuming you do require a flash for a photo, think about where that flash is. Many modern digital cameras have the flash right next to the lens. This means that when the photo is taken, and the light from the flash bounces right back towards the flash, it shows up in the lens. If the flash can be distanced from the camera, then this will greatly minimise the effect of red eye.

One way to remove the flash from the lens is to use external flashes. These don't have to be too expensive, and can be a great asset if you take a lot of portrait photos. If the flash direction on your camera is adjustable, then why not try reflectors. These can be specially assigned screens if you are in a wide space or outdoors, but if you're indoors why not try bouncing a flash off the ceiling? The best way is to experiment a little, and see what differences you can make by removing that direct reflection of the flash into the camera lens. Some cameras which do have the flash close to the lens also contain a red eye reduction feature. This feature causes the camera to emit two large flashes, one as the picture is taken and one just before. Some cameras even produce a series of minor flashes before the main flash. These 'pre-flashes' cause the subject's pupils to contract, which reduces the light which can travel through the pupil, to be reflected back into the camera. Even turning up room lights can reduce red eye, as in a brighter room the person's pupils will contract. It may not always be possible to eliminate red eye, especially in particularly stylised pictures, or those with very specific lighting requirements. Most of the time however, the effect can be eliminated, or at least reduced.

Answer by Student of the Wise on 29 Dec 2009 04:53:44

The cause of red eye is the flash reflecting from the back of the eye and into the lens. One of the best way to avoid it is to tell whoever you are taking a picture of not to look directly at the lens; instead, look at the photographer's shoulder, etc.

But, if that perfect picture already has red eye, it is pretty simple to fix it. Some websites have an editing tool to get rid of red eye in photos. Photoshop or GIMP also have the ability to get rid of red eye, although that method is a bit more complicated than the former. (GIMP is free for download at [URL Truncated]

One website I know of that could help you is Photobucket.
Try searching for a red eye editing tool in Google.
Good luck!

Answer by Fanta on 29 Dec 2009 04:59:23

Red-eye is a low light environment is a result of shooting people, shooting the direction of the object completely to the camera red-eye phenomenon of no

Answer by Elaine on 29 Dec 2009 05:08:57

Its the reflection of the camera flashing in the eyes.I am not completely positive, but it is a pretty good guess

Answer by Perfect!! on 29 Dec 2009 08:24:20

Because the light of the flash occurs too fast for the pupil to close, much of the very bright light from the flash passes into the eye through the pupil, reflects off the fundus at the back of the eyeball (see diagram in Eye), and out through the pupil.

Answer by shrkrs on 29 Dec 2009 10:50:12

The evil inside.

Answer by GBF on 29 Dec 2009 04:43:03

The light, you can go on photobucket.com make a account and upload and remove red eyes

Answer by D on 29 Dec 2009 04:43:13

satan

praise god to prevent

but then you get this thing called white eye

seen mostly in christian pictures

Answer by Jiles on 29 Dec 2009 04:43:26

i think it just has to do with the lighting in the room, or glares, or cause of the flash.. maybe im not sure.

Answer by -*JeNn* (blondie:) on 29 Dec 2009 04:43:28

the flash.

Answer by nicoleeexx on 29 Dec 2009 04:43:48

I think its caused by red blood cells inside your eye, i don't realy know how to avoid it other than put red-eye-flash on

Answer by Chad on 29 Dec 2009 04:43:55
Best Answer

Red eye occurs when light enters the eye at almost level with the eye. Because light reflects at an angle equal and opposite to its entry (in layman's terms, it makes a "V" shape) if bright light (such as from a flash) enters the eye at almost no angle it will be reflected back, or visible to, the camera. This most often happens when the pupil of the eye is dilated and gives the light more room to enter and exit the eye.

Answer by Jason on 29 Dec 2009 04:43:55

Your face...um...duh?

Answer by Fluffy Hamster on 29 Dec 2009 04:44:05

[URL Truncated]

Answer by yati on 29 Dec 2009 04:44:11

Call your local priest to exorcise the demon out of this "cute guy"

Answer by Snare on 29 Dec 2009 04:44:49

beautiful blue eyes

Answer by kelsey on 29 Dec 2009 04:45:01

Like what "D" said...

People get red eyes in pictures because of the lighting. Also, if they're wearing contacts, their eyes usually turn out red. I have two friends, Brooke and Brittany, and when I took pictures of them, their eyes were red...and they both wear contacts. So don't worry, there's no monster.

:)

Answer by LightningBolt24 on 29 Dec 2009 04:45:12

Red eye happens when the flash reflects off of the retina (which is red due to blood vessels). A lot of cameras have red eye reduction that flashes once or twice before the picture is taken, to make the pupils constrict. Look through your camera's manual to see if it has this feature, and how to use it.

Answer by jellybeanchick on 29 Dec 2009 04:45:21

Actually, red eyes in photos happens because the flash reflects off of the black parts of your eyes (pupils) and back to the camera if there isn't much of an angle. The picture is recorded before the pupils have shrunken down enough to diminish the problem. Since some peoples pupils react faster, or are smaller to begin with, it happens to some and not to others. You may have a red-eye reduction setting since you have such a fancy camera. Use it, it will flash a light before the flash to constrict your pupils enough to eliminate the red eye problem.

Answer by Andrew S on 29 Dec 2009 04:46:08

The red is caused by the reflection of the flash, Next time do not look directly at the
camera while taking a flash picture. Photography wasa hobby of mine.

Answer by Charles D on 29 Dec 2009 04:49:43

You may have noticed that red eye only appears in pictures taken using a flash. The reason for this is simply that the flash causes red eye. Humans have a curved plate covering the back of their eyeballs called the retina. This is the part of the eye that actually detects the presence of light. When the flash on a camera fires, the bright, white light emitted by the bulb travels into the eye, and bounces off the retina back into the camera lens. If that was the entire story though, we would call it 'white eye'. While the light is inside our eye, it travels through many tiny blood vessels that are present to keep the eye alive. This is how the light gets its red color.

The flash on your camera is what causes red eye, so the simplest way to eliminate it is to take away the flash! Now obviously some pictures will need the flash, so I'm not suggesting that you never use it. Be aware however, that sometimes there are better solutions. Indoor pictures commonly use flashes. Why not consider turning on room lighting, or grabbing an extra table lamp, to give that extra light you need. Natural light is mostly preferable, so placing a subject by a window or door can also achieve this.

Outdoor pictures use flashes less commonly, but it can still be useful to bring out detail in shadowy parts of an image. Just remember to think about the range of your flash if you are using one outside.
The main thing to remember is that even if there's no need for a flash, people sometimes use one 'just because they can'. Avoid needless flashes, and problems like red eye can be minimised. Assuming you do require a flash for a photo, think about where that flash is. Many modern digital cameras have the flash right next to the lens. This means that when the photo is taken, and the light from the flash bounces right back towards the flash, it shows up in the lens. If the flash can be distanced from the camera, then this will greatly minimise the effect of red eye.

One way to remove the flash from the lens is to use external flashes. These don't have to be too expensive, and can be a great asset if you take a lot of portrait photos. If the flash direction on your camera is adjustable, then why not try reflectors. These can be specially assigned screens if you are in a wide space or outdoors, but if you're indoors why not try bouncing a flash off the ceiling? The best way is to experiment a little, and see what differences you can make by removing that direct reflection of the flash into the camera lens. Some cameras which do have the flash close to the lens also contain a red eye reduction feature. This feature causes the camera to emit two large flashes, one as the picture is taken and one just before. Some cameras even produce a series of minor flashes before the main flash. These 'pre-flashes' cause the subject's pupils to contract, which reduces the light which can travel through the pupil, to be reflected back into the camera. Even turning up room lights can reduce red eye, as in a brighter room the person's pupils will contract. It may not always be possible to eliminate red eye, especially in particularly stylised pictures, or those with very specific lighting requirements. Most of the time however, the effect can be eliminated, or at least reduced.

Answer by Student of the Wise on 29 Dec 2009 04:53:44

The cause of red eye is the flash reflecting from the back of the eye and into the lens. One of the best way to avoid it is to tell whoever you are taking a picture of not to look directly at the lens; instead, look at the photographer's shoulder, etc.

But, if that perfect picture already has red eye, it is pretty simple to fix it. Some websites have an editing tool to get rid of red eye in photos. Photoshop or GIMP also have the ability to get rid of red eye, although that method is a bit more complicated than the former. (GIMP is free for download at [URL Truncated]

One website I know of that could help you is Photobucket.
Try searching for a red eye editing tool in Google.
Good luck!

Answer by Fanta on 29 Dec 2009 04:59:23

Red-eye is a low light environment is a result of shooting people, shooting the direction of the object completely to the camera red-eye phenomenon of no

Answer by Elaine on 29 Dec 2009 05:08:57

Its the reflection of the camera flashing in the eyes.I am not completely positive, but it is a pretty good guess

Answer by Perfect!! on 29 Dec 2009 08:24:20

Because the light of the flash occurs too fast for the pupil to close, much of the very bright light from the flash passes into the eye through the pupil, reflects off the fundus at the back of the eyeball (see diagram in Eye), and out through the pupil.

Answer by shrkrs on 29 Dec 2009 10:50:12

The evil inside.

Answer by GBF on 29 Dec 2009 04:43:03

The light, you can go on photobucket.com make a account and upload and remove red eyes

Answer by D on 29 Dec 2009 04:43:13

satan

praise god to prevent

but then you get this thing called white eye

seen mostly in christian pictures

Answer by Jiles on 29 Dec 2009 04:43:26

i think it just has to do with the lighting in the room, or glares, or cause of the flash.. maybe im not sure.

Answer by -*JeNn* (blondie:) on 29 Dec 2009 04:43:28

the flash.

Answer by nicoleeexx on 29 Dec 2009 04:43:48

I think its caused by red blood cells inside your eye, i don't realy know how to avoid it other than put red-eye-flash on

Answer by Chad on 29 Dec 2009 04:43:55
Best Answer

Red eye occurs when light enters the eye at almost level with the eye. Because light reflects at an angle equal and opposite to its entry (in layman's terms, it makes a "V" shape) if bright light (such as from a flash) enters the eye at almost no angle it will be reflected back, or visible to, the camera. This most often happens when the pupil of the eye is dilated and gives the light more room to enter and exit the eye.

Answer by Jason on 29 Dec 2009 04:43:55

Your face...um...duh?

Answer by Fluffy Hamster on 29 Dec 2009 04:44:05

[URL Truncated]

Answer by yati on 29 Dec 2009 04:44:11

Call your local priest to exorcise the demon out of this "cute guy"

Answer by Snare on 29 Dec 2009 04:44:49

beautiful blue eyes

Answer by kelsey on 29 Dec 2009 04:45:01

Like what "D" said...

People get red eyes in pictures because of the lighting. Also, if they're wearing contacts, their eyes usually turn out red. I have two friends, Brooke and Brittany, and when I took pictures of them, their eyes were red...and they both wear contacts. So don't worry, there's no monster.

:)

Answer by LightningBolt24 on 29 Dec 2009 04:45:12

Red eye happens when the flash reflects off of the retina (which is red due to blood vessels). A lot of cameras have red eye reduction that flashes once or twice before the picture is taken, to make the pupils constrict. Look through your camera's manual to see if it has this feature, and how to use it.

Answer by jellybeanchick on 29 Dec 2009 04:45:21

Actually, red eyes in photos happens because the flash reflects off of the black parts of your eyes (pupils) and back to the camera if there isn't much of an angle. The picture is recorded before the pupils have shrunken down enough to diminish the problem. Since some peoples pupils react faster, or are smaller to begin with, it happens to some and not to others. You may have a red-eye reduction setting since you have such a fancy camera. Use it, it will flash a light before the flash to constrict your pupils enough to eliminate the red eye problem.

Answer by Andrew S on 29 Dec 2009 04:46:08

The red is caused by the reflection of the flash, Next time do not look directly at the
camera while taking a flash picture. Photography wasa hobby of mine.

Answer by Charles D on 29 Dec 2009 04:49:43

You may have noticed that red eye only appears in pictures taken using a flash. The reason for this is simply that the flash causes red eye. Humans have a curved plate covering the back of their eyeballs called the retina. This is the part of the eye that actually detects the presence of light. When the flash on a camera fires, the bright, white light emitted by the bulb travels into the eye, and bounces off the retina back into the camera lens. If that was the entire story though, we would call it 'white eye'. While the light is inside our eye, it travels through many tiny blood vessels that are present to keep the eye alive. This is how the light gets its red color.

The flash on your camera is what causes red eye, so the simplest way to eliminate it is to take away the flash! Now obviously some pictures will need the flash, so I'm not suggesting that you never use it. Be aware however, that sometimes there are better solutions. Indoor pictures commonly use flashes. Why not consider turning on room lighting, or grabbing an extra table lamp, to give that extra light you need. Natural light is mostly preferable, so placing a subject by a window or door can also achieve this.

Outdoor pictures use flashes less commonly, but it can still be useful to bring out detail in shadowy parts of an image. Just remember to think about the range of your flash if you are using one outside.
The main thing to remember is that even if there's no need for a flash, people sometimes use one 'just because they can'. Avoid needless flashes, and problems like red eye can be minimised. Assuming you do require a flash for a photo, think about where that flash is. Many modern digital cameras have the flash right next to the lens. This means that when the photo is taken, and the light from the flash bounces right back towards the flash, it shows up in the lens. If the flash can be distanced from the camera, then this will greatly minimise the effect of red eye.

One way to remove the flash from the lens is to use external flashes. These don't have to be too expensive, and can be a great asset if you take a lot of portrait photos. If the flash direction on your camera is adjustable, then why not try reflectors. These can be specially assigned screens if you are in a wide space or outdoors, but if you're indoors why not try bouncing a flash off the ceiling? The best way is to experiment a little, and see what differences you can make by removing that direct reflection of the flash into the camera lens. Some cameras which do have the flash close to the lens also contain a red eye reduction feature. This feature causes the camera to emit two large flashes, one as the picture is taken and one just before. Some cameras even produce a series of minor flashes before the main flash. These 'pre-flashes' cause the subject's pupils to contract, which reduces the light which can travel through the pupil, to be reflected back into the camera. Even turning up room lights can reduce red eye, as in a brighter room the person's pupils will contract. It may not always be possible to eliminate red eye, especially in particularly stylised pictures, or those with very specific lighting requirements. Most of the time however, the effect can be eliminated, or at least reduced.

Answer by Student of the Wise on 29 Dec 2009 04:53:44

The cause of red eye is the flash reflecting from the back of the eye and into the lens. One of the best way to avoid it is to tell whoever you are taking a picture of not to look directly at the lens; instead, look at the photographer's shoulder, etc.

But, if that perfect picture already has red eye, it is pretty simple to fix it. Some websites have an editing tool to get rid of red eye in photos. Photoshop or GIMP also have the ability to get rid of red eye, although that method is a bit more complicated than the former. (GIMP is free for download at [URL Truncated]

One website I know of that could help you is Photobucket.
Try searching for a red eye editing tool in Google.
Good luck!

Answer by Fanta on 29 Dec 2009 04:59:23

Red-eye is a low light environment is a result of shooting people, shooting the direction of the object completely to the camera red-eye phenomenon of no

Answer by Elaine on 29 Dec 2009 05:08:57

Its the reflection of the camera flashing in the eyes.I am not completely positive, but it is a pretty good guess

Answer by Perfect!! on 29 Dec 2009 08:24:20

Because the light of the flash occurs too fast for the pupil to close, much of the very bright light from the flash passes into the eye through the pupil, reflects off the fundus at the back of the eyeball (see diagram in Eye), and out through the pupil.

Answer by shrkrs on 29 Dec 2009 10:50:12

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